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11 +8x = 10x -3
11 +3 = 10x -8x
14 = 2x
14/2 = x
7= x
x = 7
3x -4 +3x = 6x+x+16
6x -4 = 7x +16
-4 -16 = 7x -6x
-20 = x
x = -20